Answer:The technique use in this study is referred to as a double blind
Explanation:
A double blind study is the one that both participants and experimenters or researchers are not made aware who is given a certain treatment.
In double blind researchers will not know if what they are receiving is part of the test itself as they interact with participants or they are receiving a placebo.
This process is useful to eliminate and avoid bias results.
For example, in the above text the effect of caffein on attention is being tested so the researchers will not know whether the drink given to them is actual for the test or just the placebo , they don't know who is in control of the experiment.
Human migration is when people move from one place to another, typically through different countries. They most likely move their with a plan to settle there temporarily or permanently in this new location. It involves moving over long stretches of land or water to get to a new country or region.
I hope this helps.
sparta i believe. sorry if i’m wrong but i think that’s right
Effects of the Great Depression Quick Check (Connexus)
1. B. by refusing to sell produce or purchase other goods
2. C. Presidents Organization of Unemployment Relief
3. A. Declining agricultural prices led to lower wages and massive layoffs.
C. Business owners conspired to fire African Americans nd give their jobs to whites
4. "With the addition of sound, movies became increasingly popular"
"Radio was also wildly popular offering many kinds of programs, from sermons to soap operas"
"In the 1930's, big bands and swing music were popular, with Duke Ellington, Benny Goodman, an Glenn Miller [as the most] popular bandleaders"
